操作方法：在控制台应用程序中绘制表格的最佳方法 (C#)答案

【问题标题】：How To: Best way to draw table in console app (C#)操作方法：在控制台应用程序中绘制表格的最佳方法 (C#)
【发布时间】：2010-10-25 19:18:37
【问题描述】：

我有一个有趣的问题。想象一下，我有很多数据以非常快的间隔发生变化。我想在控制台应用程序中将该数据显示为表格。 f.ex:

-------------------------------------------------------------------------
|    Column 1     |    Column 2     |    Column 3     |    Column 4     |
-------------------------------------------------------------------------
|                 |                 |                 |                 |
|                 |                 |                 |                 |
|                 |                 |                 |                 |
-------------------------------------------------------------------------

如何保持快速以及如何固定列宽？我知道如何在 java 中做到这一点，但我不知道它是如何在 C# 中完成的。

【问题讨论】：

如果您提供 Java 解决方案以便帮助您翻译成 C# 会怎样？但是看看 String 类的 Length/PadLeft/PadRight/...

标签： c# console drawing

【解决方案1】：

将String.Format 与对齐值一起使用。

例如：

String.Format("|{0,5}|{1,5}|{2,5}|{3,5}|", arg0, arg1, arg2, arg3);

创建一个格式化的行。

【讨论】：

不会打印四次相同的值吗？
是的，你应该修复：String.Format("|{0,10}|{1,10}|{2,10}|{3,10}|", arg0, arg1, arg2, arg3);
如果你不需要桌子的棱角，这很好用。不要忘记使用 PadRight(x) 或 PadLeft(x) 来帮助您调整间距。对于我需要的东西，我只需要一些易于阅读的东西，并且在删除 |s 之后就成功了。
使用- 左对齐内容，例如：{0,-5}
这比许多前面提到的库要简单和好得多，特别是如果这是一个渐进式日志输出到控制台，因为上面的许多库需要一个完整的数据结构，以便将所有内容包含在一个有边框的表格中，并且全部。对于 C# 字符串插值，使用$"{interpolated,n:f}"，其中n 是您的可选对齐方式（如上），f 是您的可选格式字符串。

【解决方案2】：

您可以执行以下操作：

static int tableWidth = 73;

static void Main(string[] args)
{
    Console.Clear();
    PrintLine();
    PrintRow("Column 1", "Column 2", "Column 3", "Column 4");
    PrintLine();
    PrintRow("", "", "", "");
    PrintRow("", "", "", "");
    PrintLine();
    Console.ReadLine();
}

static void PrintLine()
{
    Console.WriteLine(new string('-', tableWidth));
}

static void PrintRow(params string[] columns)
{
    int width = (tableWidth - columns.Length) / columns.Length;
    string row = "|";

    foreach (string column in columns)
    {
        row += AlignCentre(column, width) + "|";
    }

    Console.WriteLine(row);
}

static string AlignCentre(string text, int width)
{
    text = text.Length > width ? text.Substring(0, width - 3) + "..." : text;

    if (string.IsNullOrEmpty(text))
    {
        return new string(' ', width);
    }
    else
    {
        return text.PadRight(width - (width - text.Length) / 2).PadLeft(width);
    }
}

【讨论】：

【解决方案3】：

编辑：感谢@superlogical，您现在可以在github中找到并改进以下代码！

我根据这里的一些想法编写了这个课程。列宽是最佳的，它可以使用这个简单的 API 处理对象数组：

static void Main(string[] args)
{
  IEnumerable<Tuple<int, string, string>> authors =
    new[]
    {
      Tuple.Create(1, "Isaac", "Asimov"),
      Tuple.Create(2, "Robert", "Heinlein"),
      Tuple.Create(3, "Frank", "Herbert"),
      Tuple.Create(4, "Aldous", "Huxley"),
    };

  Console.WriteLine(authors.ToStringTable(
    new[] {"Id", "First Name", "Surname"},
    a => a.Item1, a => a.Item2, a => a.Item3));

  /* Result:        
  | Id | First Name | Surname  |
  |----------------------------|
  | 1  | Isaac      | Asimov   |
  | 2  | Robert     | Heinlein |
  | 3  | Frank      | Herbert  |
  | 4  | Aldous     | Huxley   |
  */
}

这是课程：

public static class TableParser
{
  public static string ToStringTable<T>(
    this IEnumerable<T> values,
    string[] columnHeaders,
    params Func<T, object>[] valueSelectors)
  {
    return ToStringTable(values.ToArray(), columnHeaders, valueSelectors);
  }

  public static string ToStringTable<T>(
    this T[] values,
    string[] columnHeaders,
    params Func<T, object>[] valueSelectors)
  {
    Debug.Assert(columnHeaders.Length == valueSelectors.Length);

    var arrValues = new string[values.Length + 1, valueSelectors.Length];

    // Fill headers
    for (int colIndex = 0; colIndex < arrValues.GetLength(1); colIndex++)
    {
      arrValues[0, colIndex] = columnHeaders[colIndex];
    }

    // Fill table rows
    for (int rowIndex = 1; rowIndex < arrValues.GetLength(0); rowIndex++)
    {
      for (int colIndex = 0; colIndex < arrValues.GetLength(1); colIndex++)
      {
        arrValues[rowIndex, colIndex] = valueSelectors[colIndex]
          .Invoke(values[rowIndex - 1]).ToString();
      }
    }

    return ToStringTable(arrValues);
  }

  public static string ToStringTable(this string[,] arrValues)
  {
    int[] maxColumnsWidth = GetMaxColumnsWidth(arrValues);
    var headerSpliter = new string('-', maxColumnsWidth.Sum(i => i + 3) - 1);

    var sb = new StringBuilder();
    for (int rowIndex = 0; rowIndex < arrValues.GetLength(0); rowIndex++)
    {
      for (int colIndex = 0; colIndex < arrValues.GetLength(1); colIndex++)
      {
        // Print cell
        string cell = arrValues[rowIndex, colIndex];
        cell = cell.PadRight(maxColumnsWidth[colIndex]);
        sb.Append(" | ");
        sb.Append(cell);
      }

      // Print end of line
      sb.Append(" | ");
      sb.AppendLine();

      // Print splitter
      if (rowIndex == 0)
      {
        sb.AppendFormat(" |{0}| ", headerSpliter);
        sb.AppendLine();
      }
    }

    return sb.ToString();
  }

  private static int[] GetMaxColumnsWidth(string[,] arrValues)
  {
    var maxColumnsWidth = new int[arrValues.GetLength(1)];
    for (int colIndex = 0; colIndex < arrValues.GetLength(1); colIndex++)
    {
      for (int rowIndex = 0; rowIndex < arrValues.GetLength(0); rowIndex++)
      {
        int newLength = arrValues[rowIndex, colIndex].Length;
        int oldLength = maxColumnsWidth[colIndex];

        if (newLength > oldLength)
        {
          maxColumnsWidth[colIndex] = newLength;
        }
      }
    }

    return maxColumnsWidth;
  }
}

编辑：我添加了一个小改进——如果你希望列标题是属性名，在TableParser中添加如下方法（注意会因为反射会慢一点):

public static string ToStringTable<T>(
    this IEnumerable<T> values,
    params Expression<Func<T, object>>[] valueSelectors)
{
  var headers = valueSelectors.Select(func => GetProperty(func).Name).ToArray();
  var selectors = valueSelectors.Select(exp => exp.Compile()).ToArray();
  return ToStringTable(values, headers, selectors);
}

private static PropertyInfo GetProperty<T>(Expression<Func<T, object>> expresstion)
{
  if (expresstion.Body is UnaryExpression)
  {
    if ((expresstion.Body as UnaryExpression).Operand is MemberExpression)
    {
      return ((expresstion.Body as UnaryExpression).Operand as MemberExpression).Member as PropertyInfo;
    }
  }

  if ((expresstion.Body is MemberExpression))
  {
    return (expresstion.Body as MemberExpression).Member as PropertyInfo;
  }
  return null;
}

【讨论】：

GetProperty 方法在哪里？
@superlogical，它已添加到答案的底部。感谢您的关注。
与此处的其他答案相比，我喜欢自包含的扩展方法样式。谢谢！
太棒了，我用过它，它工作得很好，只是把这个arrValues[rowIndex, colIndex] = valueSelectors[colIndex].Invoke(values[rowIndex - 1]).ToString();编辑成var val = valueSelectors[colIndex].Invoke(values[rowIndex - 1]); arrValues[rowIndex, colIndex] = val == null ? "null" : val.ToString();，这样它就显示为空了。
这很好用，直到您开始使用非 Unicode 字符。然后宽度就搞砸了。

【解决方案4】：

有几个开源库支持控制台表格格式，范围从简单（如此处答案中的代码示例）到更高级。

控制台表

从 NuGet 统计数据来看，最流行的表格格式化库是 ConsoleTable。表是这样构造的（来自自述文件）：

var table = new ConsoleTable("one", "two", "three");
table.AddRow(1, 2, 3)
     .AddRow("this line should be longer", "yes it is", "oh");

可以使用其中一种预定义样式来格式化表格。它看起来像这样：

--------------------------------------------------
| one                        | two       | three |
--------------------------------------------------
| 1                          | 2         | 3     |
--------------------------------------------------
| this line should be longer | yes it is | oh    |
--------------------------------------------------

这个库需要没有格式的单行单元格。

有几个基于 ConsoleTable 的库具有略微扩展的功能集，例如更多的线条样式。

CsConsoleFormat

如果您需要更复杂的格式，可以使用CsConsoleFormat。† 这是从流程列表（来自示例项目）生成的表格：

new Grid { Stroke = StrokeHeader, StrokeColor = DarkGray }
    .AddColumns(
        new Column { Width = GridLength.Auto },
        new Column { Width = GridLength.Auto, MaxWidth = 20 },
        new Column { Width = GridLength.Star(1) },
        new Column { Width = GridLength.Auto }
    )
    .AddChildren(
        new Cell { Stroke = StrokeHeader, Color = White }
            .AddChildren("Id"),
        new Cell { Stroke = StrokeHeader, Color = White }
            .AddChildren("Name"),
        new Cell { Stroke = StrokeHeader, Color = White }
            .AddChildren("Main Window Title"),
        new Cell { Stroke = StrokeHeader, Color = White }
            .AddChildren("Private Memory"),
        processes.Select(process => new[] {
            new Cell { Stroke = StrokeRight }
                .AddChildren(process.Id),
            new Cell { Stroke = StrokeRight, Color = Yellow, TextWrap = TextWrapping.NoWrap }
                .AddChildren(process.ProcessName),
            new Cell { Stroke = StrokeRight, Color = White, TextWrap = TextWrapping.NoWrap }
                .AddChildren(process.MainWindowTitle),
            new Cell { Stroke = LineThickness.None, Align = HorizontalAlignment.Right }
                .AddChildren(process.PrivateMemorySize64.ToString("n0")),
        })
    )

最终结果将如下所示：

它支持任何类型的表格行（包括几个和可定制的）、带自动换行的多行单元格、颜色、基于内容或百分比增长的列、文本对齐等。

_{† CsConsoleFormat 是我开发的。}

【讨论】：

我知道它已经很老了，但是如何创建多行单元格？我在任何地方都没有找到它
@Morta1 这个答案和 CsConsoleFormat 库都不是旧的。如果您使用的是 CsConsoleFormat，您可以手动插入换行符（单元格内的字符串中的“\n”），它将被正确处理，或者让库自动换行文本（这是默认设置，所以你不要添加TextWrap = TextWrapping.NoWrap 与上面的示例不同）。
感谢您的快速回答，有没有使用 ConsoleTable 的方法？
@Morta1 不。我认为任何简单的库都不支持。
@HarveyDarvey 类似new Cell(text) { Color = text == "true" ? Green : Red }。如果您有许多具有相似格式规则的表格，您可以将该代码放入某个函数中，无论是单元格、行还是整个表格。

【解决方案5】：

class ArrayPrinter
    {
    #region Declarations

    static bool isLeftAligned = false;
    const string cellLeftTop = "┌";
    const string cellRightTop = "┐";
    const string cellLeftBottom = "└";
    const string cellRightBottom = "┘";
    const string cellHorizontalJointTop = "┬";
    const string cellHorizontalJointbottom = "┴";
    const string cellVerticalJointLeft = "├";
    const string cellTJoint = "┼";
    const string cellVerticalJointRight = "┤";
    const string cellHorizontalLine = "─";
    const string cellVerticalLine = "│";

    #endregion

    #region Private Methods

    private static int GetMaxCellWidth(string[,] arrValues)
    {
        int maxWidth = 1;

        for (int i = 0; i < arrValues.GetLength(0); i++)
        {
            for (int j = 0; j < arrValues.GetLength(1); j++)
            {
                int length = arrValues[i, j].Length;
                if (length > maxWidth)
                {
                    maxWidth = length;
                }
            }
        }

        return maxWidth;
    }

    private static string GetDataInTableFormat(string[,] arrValues)
    {
        string formattedString = string.Empty;

        if (arrValues == null)
            return formattedString;

        int dimension1Length = arrValues.GetLength(0);
        int dimension2Length = arrValues.GetLength(1);

        int maxCellWidth = GetMaxCellWidth(arrValues);
        int indentLength = (dimension2Length * maxCellWidth) + (dimension2Length - 1);
        //printing top line;
        formattedString = string.Format("{0}{1}{2}{3}", cellLeftTop, Indent(indentLength), cellRightTop, System.Environment.NewLine);

        for (int i = 0; i < dimension1Length; i++)
        {
            string lineWithValues = cellVerticalLine;
            string line = cellVerticalJointLeft;
            for (int j = 0; j < dimension2Length; j++)
            {
                string value = (isLeftAligned) ? arrValues[i, j].PadRight(maxCellWidth, ' ') : arrValues[i, j].PadLeft(maxCellWidth, ' ');
                lineWithValues += string.Format("{0}{1}", value, cellVerticalLine);
                line += Indent(maxCellWidth);
                if (j < (dimension2Length - 1))
                {
                    line += cellTJoint;
                }
            }
            line += cellVerticalJointRight;
            formattedString += string.Format("{0}{1}", lineWithValues, System.Environment.NewLine);
            if (i < (dimension1Length - 1))
            {
                formattedString += string.Format("{0}{1}", line, System.Environment.NewLine);
            }
        }

        //printing bottom line
        formattedString += string.Format("{0}{1}{2}{3}", cellLeftBottom, Indent(indentLength), cellRightBottom, System.Environment.NewLine);
        return formattedString;
    }

    private static string Indent(int count)
    {
        return string.Empty.PadLeft(count, '─');                 
    }

    #endregion

    #region Public Methods

    public static void PrintToStream(string[,] arrValues, StreamWriter writer)
    {
        if (arrValues == null)
            return;

        if (writer == null)
            return;

        writer.Write(GetDataInTableFormat(arrValues));
    }

    public static void PrintToConsole(string[,] arrValues)
    {
        if (arrValues == null)
            return;

        Console.WriteLine(GetDataInTableFormat(arrValues));
    }

    #endregion

    static void Main(string[] args)
    {           
        int value = 997;
        string[,] arrValues = new string[5, 5];
        for (int i = 0; i < arrValues.GetLength(0); i++)
        {
            for (int j = 0; j < arrValues.GetLength(1); j++)
            {
                value++;
                arrValues[i, j] = value.ToString();
            }
        }
        ArrayPrinter.PrintToConsole(arrValues);
        Console.ReadLine();
    }
}

【讨论】：

为了获得更大的灵活性和更好的代码重用： 1. 将参数类型从StreamWriter 更改为TextWriter。 2. 将PrintToConsole 代码替换为：PrintToStream(arrValues, Console.Out); 3. ??? 4. 利润！

【解决方案6】：

我想要可变宽度的列，我并不特别关心方框字符。另外，我需要为每一行打印一些额外的信息。

所以如果其他人需要，我会为你节省几分钟：

public class TestTableBuilder
{

    public interface ITextRow
    {
        String Output();
        void Output(StringBuilder sb);
        Object Tag { get; set; }
    }

    public class TableBuilder : IEnumerable<ITextRow>
    {
        protected class TextRow : List<String>, ITextRow
        {
            protected TableBuilder owner = null;
            public TextRow(TableBuilder Owner)
            {
                owner = Owner;
                if (owner == null) throw new ArgumentException("Owner");
            }
            public String Output()
            {
                StringBuilder sb = new StringBuilder();
                Output(sb);
                return sb.ToString();
            }
            public void Output(StringBuilder sb)
            {
                sb.AppendFormat(owner.FormatString, this.ToArray());
            }
            public Object Tag { get; set; }
        }

        public String Separator { get; set; }

        protected List<ITextRow> rows = new List<ITextRow>();
        protected List<int> colLength = new List<int>();

        public TableBuilder()
        {
            Separator = "  ";
        }

        public TableBuilder(String separator)
            : this()
        {
            Separator = separator;
        }

        public ITextRow AddRow(params object[] cols)
        {
            TextRow row = new TextRow(this);
            foreach (object o in cols)
            {
                String str = o.ToString().Trim();
                row.Add(str);
                if (colLength.Count >= row.Count)
                {
                    int curLength = colLength[row.Count - 1];
                    if (str.Length > curLength) colLength[row.Count - 1] = str.Length;
                }
                else
                {
                    colLength.Add(str.Length);
                }
            }
            rows.Add(row);
            return row;
        }

        protected String _fmtString = null;
        public String FormatString
        {
            get
            {
                if (_fmtString == null)
                {
                    String format = "";
                    int i = 0;
                    foreach (int len in colLength)
                    {
                        format += String.Format("{{{0},-{1}}}{2}", i++, len, Separator);
                    }
                    format += "\r\n";
                    _fmtString = format;
                }
                return _fmtString;
            }
        }

        public String Output()
        {
            StringBuilder sb = new StringBuilder();
            foreach (TextRow row in rows)
            {
                row.Output(sb);
            }
            return sb.ToString();
        }

        #region IEnumerable Members

        public IEnumerator<ITextRow> GetEnumerator()
        {
            return rows.GetEnumerator();
        }

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        {
            return rows.GetEnumerator();
        }

        #endregion
    }



    static void Main(String[] args)
    {
        TableBuilder tb = new TableBuilder();
        tb.AddRow("When", "ID", "Name");
        tb.AddRow("----", "--", "----");

        tb.AddRow(DateTime.Now, "1", "Name1");
        tb.AddRow(DateTime.Now, "1", "Name2");

        Console.Write(tb.Output());
        Console.WriteLine();

        // or

        StringBuilder sb = new StringBuilder();
        int i = 0;
        foreach (ITextRow tr in tb)
        {
            tr.Output(sb);
            if (i++ > 1) sb.AppendLine("more stuff per line");
        }
        Console.Write(sb.ToString());
    }
}

输出：

当 ID 名称 ---- -- ---- 2/4/2013 8:37:44 PM 1 姓名1 2/4/2013 8:37:44 PM 1 姓名2 当 ID 名称 ---- -- ---- 2/4/2013 8:37:44 PM 1 姓名1 每行更多的东西 2/4/2013 8:37:44 PM 1 姓名2 每行更多的东西

【讨论】：

【解决方案7】：

我在 GitHub 上有一个项目可以使用

https://github.com/BrunoVT1992/ConsoleTable

你可以这样使用它：

var table = new Table();

table.SetHeaders("Name", "Date", "Number");

for (int i = 0; i <= 10; i++)
{
    if (i % 2 == 0)
        table.AddRow($"name {i}", DateTime.Now.AddDays(-i).ToLongDateString(), i.ToString());
    else
        table.AddRow($"long name {i}", DateTime.Now.AddDays(-i).ToLongDateString(), (i * 5000).ToString());
}

Console.WriteLine(table.ToString());

它会给出这个结果：

【讨论】：

除了你的包之外，还有其他包，但我更喜欢你的包，因为输出更好，带有特殊字符的线路连接点。 API 很简单，不会做太多假设（例如需要标头），这很好。你会考虑在 Nuget 上添加它吗？无论如何，谢谢！
不错@BrunoVT。谢谢！我也想要一个 Nuget。
这是我的首选，简单，好看，可以完成工作。谢谢。

【解决方案8】：

如果这对某人有帮助，这是我为我的需要编写的一个简单的类。您可以轻松更改它以满足您的需求。

using System.Collections.Generic;
using System.Linq;

namespace Utilities
{
    public class TablePrinter
    {
        private readonly string[] titles;
        private readonly List<int> lengths;
        private readonly List<string[]> rows = new List<string[]>();

        public TablePrinter(params string[] titles)
        {
            this.titles = titles;
            lengths = titles.Select(t => t.Length).ToList();
        }

        public void AddRow(params object[] row)
        {
            if (row.Length != titles.Length)
            {
                throw new System.Exception($"Added row length [{row.Length}] is not equal to title row length [{titles.Length}]");
            }
            rows.Add(row.Select(o => o.ToString()).ToArray());
            for (int i = 0; i < titles.Length; i++)
            {
                if (rows.Last()[i].Length > lengths[i])
                {
                    lengths[i] = rows.Last()[i].Length;
                }
            }
        }

        public void Print()
        {
            lengths.ForEach(l => System.Console.Write("+-" + new string('-', l) + '-'));
            System.Console.WriteLine("+");

            string line = "";
            for (int i = 0; i < titles.Length; i++)
            {
                line += "| " + titles[i].PadRight(lengths[i]) + ' ';
            }
            System.Console.WriteLine(line + "|");

            lengths.ForEach(l => System.Console.Write("+-" + new string('-', l) + '-'));
            System.Console.WriteLine("+");

            foreach (var row in rows)
            {
                line = "";
                for (int i = 0; i < row.Length; i++)
                {
                    if (int.TryParse(row[i], out int n))
                    {
                        line += "| " + row[i].PadLeft(lengths[i]) + ' ';  // numbers are padded to the left
                    }
                    else
                    {
                        line += "| " + row[i].PadRight(lengths[i]) + ' ';
                    }
                }
                System.Console.WriteLine(line + "|");
            }

            lengths.ForEach(l => System.Console.Write("+-" + new string('-', l) + '-'));
            System.Console.WriteLine("+");
        }
    }
}

示例用法：

var t = new TablePrinter("id", "Column A", "Column B");
t.AddRow(1, "Val A1", "Val B1");
t.AddRow(2, "Val A2", "Val B2");
t.AddRow(100, "Val A100", "Val B100");
t.Print();

输出：

+-----+----------+----------+
| id  | Column A | Column B |
+-----+----------+----------+
|   1 | Val A1   | Val B1   |
|   2 | Val A2   | Val B2   |
| 100 | Val A100 | Val B100 |
+-----+----------+----------+

【讨论】：

【解决方案9】：

这是对先前答案的改进。它增加了对具有不同长度的值和具有不同数量的单元格的行的支持。例如：

┌──────────┬─────────┬──────────────────────────┬────────────────┬─────┬───────┐
│Identifier│     Type│               Description│  CPU Credit Use│Hours│Balance│
├──────────┼─────────┼──────────────────────────┼────────────────┼─────┼───────┘
│ i-1234154│ t2.small│       This is an example.│         3263.75│  360│
├──────────┼─────────┼──────────────────────────┼────────────────┼─────┘
│ i-1231412│ t2.small│  This is another example.│         3089.93│
└──────────┴─────────┴──────────────────────────┴────────────────┘

代码如下：

public class ArrayPrinter
{
    const string TOP_LEFT_JOINT = "┌";
    const string TOP_RIGHT_JOINT = "┐";
    const string BOTTOM_LEFT_JOINT = "└";
    const string BOTTOM_RIGHT_JOINT = "┘";
    const string TOP_JOINT = "┬";
    const string BOTTOM_JOINT = "┴";
    const string LEFT_JOINT = "├";
    const string JOINT = "┼";
    const string RIGHT_JOINT = "┤";
    const char HORIZONTAL_LINE = '─';
    const char PADDING = ' ';
    const string VERTICAL_LINE = "│";

    private static int[] GetMaxCellWidths(List<string[]> table)
    {
        int maximumCells = 0;
        foreach (Array row in table)
        {
            if (row.Length > maximumCells)
                maximumCells = row.Length;
        }

        int[] maximumCellWidths = new int[maximumCells];
        for (int i = 0; i < maximumCellWidths.Length; i++)
            maximumCellWidths[i] = 0;

        foreach (Array row in table)
        {
            for (int i = 0; i < row.Length; i++)
            {
                if (row.GetValue(i).ToString().Length > maximumCellWidths[i])
                    maximumCellWidths[i] = row.GetValue(i).ToString().Length;
            }
        }

        return maximumCellWidths;
    }

    public static string GetDataInTableFormat(List<string[]> table)
    {
        StringBuilder formattedTable = new StringBuilder();
        Array nextRow = table.FirstOrDefault();
        Array previousRow = table.FirstOrDefault();

        if (table == null || nextRow == null)
            return String.Empty;

        // FIRST LINE:
        int[] maximumCellWidths = GetMaxCellWidths(table);
        for (int i = 0; i < nextRow.Length; i++)
        {
            if (i == 0 && i == nextRow.Length - 1)
                formattedTable.Append(String.Format("{0}{1}{2}", TOP_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
            else if (i == 0)
                formattedTable.Append(String.Format("{0}{1}", TOP_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
            else if (i == nextRow.Length - 1)
                formattedTable.AppendLine(String.Format("{0}{1}{2}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
            else
                formattedTable.Append(String.Format("{0}{1}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
        }

        int rowIndex = 0;
        int lastRowIndex = table.Count - 1;
        foreach (Array thisRow in table)
        {
            // LINE WITH VALUES:
            int cellIndex = 0;
            int lastCellIndex = thisRow.Length - 1;
            foreach (object thisCell in thisRow)
            {
                string thisValue = thisCell.ToString().PadLeft(maximumCellWidths[cellIndex], PADDING);

                if (cellIndex == 0 && cellIndex == lastCellIndex)
                    formattedTable.AppendLine(String.Format("{0}{1}{2}", VERTICAL_LINE, thisValue, VERTICAL_LINE));
                else if (cellIndex == 0)
                    formattedTable.Append(String.Format("{0}{1}", VERTICAL_LINE, thisValue));
                else if (cellIndex == lastCellIndex)
                    formattedTable.AppendLine(String.Format("{0}{1}{2}", VERTICAL_LINE, thisValue, VERTICAL_LINE));
                else
                    formattedTable.Append(String.Format("{0}{1}", VERTICAL_LINE, thisValue));

                cellIndex++;
            }

            previousRow = thisRow;

            // SEPARATING LINE:
            if (rowIndex != lastRowIndex)
            {
                nextRow = table[rowIndex + 1];

                int maximumCells = Math.Max(previousRow.Length, nextRow.Length);
                for (int i = 0; i < maximumCells; i++)
                {
                    if (i == 0 && i == maximumCells - 1)
                    {
                        formattedTable.Append(String.Format("{0}{1}{2}", LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), RIGHT_JOINT));
                    }
                    else if (i == 0)
                    {
                        formattedTable.Append(String.Format("{0}{1}", LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
                    }
                    else if (i == maximumCells - 1)
                    {
                        if (i > previousRow.Length)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
                        else if (i > nextRow.Length)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
                        else if (i > previousRow.Length - 1)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
                        else if (i > nextRow.Length - 1)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
                        else
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), RIGHT_JOINT));
                    }
                    else
                    {
                        if (i > previousRow.Length)
                            formattedTable.Append(String.Format("{0}{1}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
                        else if (i > nextRow.Length)
                            formattedTable.Append(String.Format("{0}{1}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
                        else
                            formattedTable.Append(String.Format("{0}{1}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
                    }
                }
            }

            rowIndex++;
        }

        // LAST LINE:
        for (int i = 0; i < previousRow.Length; i++)
        {
            if (i == 0)
                formattedTable.Append(String.Format("{0}{1}", BOTTOM_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
            else if (i == previousRow.Length - 1)
                formattedTable.AppendLine(String.Format("{0}{1}{2}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
            else
                formattedTable.Append(String.Format("{0}{1}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
        }

        return formattedTable.ToString();
    }
}

【讨论】：

在经过一些测试后，您的代码无法很好地处理单列的情况。

【解决方案10】：

Spectre.Console 可以做到这一点。

例子：

简单用法：

// Create a table
var table = new Table();

// Add some columns
table.AddColumn("Foo");
table.AddColumn(new TableColumn("Bar").Centered());

// Add some rows
table.AddRow("Baz", "[green]Qux[/]");
table.AddRow(new Markup("[blue]Corgi[/]"), new Panel("Waldo"));

// Render the table to the console
AnsiConsole.Render(table);

【讨论】：

【解决方案11】：

使用 MarkDownLog 库（可以在 NuGet 上找到）

您可以简单地将扩展名 ToMarkdownTable() 用于任何集合，它会为您完成所有格式设置。

 Console.WriteLine(
    yourCollection.Select(s => new
                    {
                        column1 = s.col1,
                        column2 = s.col2,
                        column3 = s.col3,
                        StaticColumn = "X"
                    })
                    .ToMarkdownTable());

输出看起来像这样：

Column1  | Column2   | Column3   | StaticColumn   
--------:| ---------:| ---------:| --------------
         |           |           | X

【讨论】：

【解决方案12】：

public static void ToPrintConsole(this DataTable dataTable)
    {
        // Print top line
        Console.WriteLine(new string('-', 75));

        // Print col headers
        var colHeaders = dataTable.Columns.Cast<DataColumn>().Select(arg => arg.ColumnName);
        foreach (String s in colHeaders)
        {
            Console.Write("| {0,-20}", s);
        }
        Console.WriteLine();

        // Print line below col headers
        Console.WriteLine(new string('-', 75));

        // Print rows
        foreach (DataRow row in dataTable.Rows)
        {
            foreach (Object o in row.ItemArray)
            {
                Console.Write("| {0,-20}", o.ToString());
            }
            Console.WriteLine();
        }

        // Print bottom line
        Console.WriteLine(new string('-', 75));
    }

【讨论】：

【解决方案13】：

@grampa 答案的扩展。现在表格居中对齐。从两端添加了额外的填充。

public class TablePrinter
{
    const string TOP_LEFT_JOINT = "┌";
    const string TOP_RIGHT_JOINT = "┐";
    const string BOTTOM_LEFT_JOINT = "└";
    const string BOTTOM_RIGHT_JOINT = "┘";
    const string TOP_JOINT = "┬";
    const string BOTTOM_JOINT = "┴";
    const string LEFT_JOINT = "├";
    const string JOINT = "┼";
    const string RIGHT_JOINT = "┤";
    const char HORIZONTAL_LINE = '─';
    const char PADDING = ' ';
    const string VERTICAL_LINE = "│";

    private static int[] GetMaxCellWidths(List<string[]> table)
    {
        int maximumCells = 0;
        foreach (Array row in table)
        {
            if (row.Length > maximumCells)
                maximumCells = row.Length;
        }

        int[] maximumCellWidths = new int[maximumCells];
        for (int i = 0; i < maximumCellWidths.Length; i++)
            maximumCellWidths[i] = 0;

        foreach (Array row in table)
        {
            for (int i = 0; i < row.Length; i++)
            {
                if (row.GetValue(i).ToString().Length > maximumCellWidths[i])
                    maximumCellWidths[i] = row.GetValue(i).ToString().Length +2;
            }
        }

        return maximumCellWidths;
    }

    public static string GetDataInTableFormat(List<string[]> table)
    {
        StringBuilder formattedTable = new StringBuilder();
        Array nextRow = table.FirstOrDefault();
        Array previousRow = table.FirstOrDefault();

        if (table == null || nextRow == null)
            return String.Empty;

        // FIRST LINE:
        int[] maximumCellWidths = GetMaxCellWidths(table);
        for (int i = 0; i < nextRow.Length; i++)
        {
            if (i == 0 && i == nextRow.Length - 1)
                formattedTable.Append(String.Format("{0}{1}{2}", TOP_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
            else if (i == 0)
                formattedTable.Append(String.Format("{0}{1}", TOP_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE)));
            else if (i == nextRow.Length - 1)
                formattedTable.AppendLine(String.Format("{0}{1}{2}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
            else
                formattedTable.Append(String.Format("{0}{1}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE)));
        }

        int rowIndex = 0;
        int lastRowIndex = table.Count - 1;
        foreach (Array thisRow in table)
        {
            // LINE WITH VALUES:
            int cellIndex = 0;
            int lastCellIndex = thisRow.Length - 1;
            foreach (object thisCell in thisRow)
            {
                string thisValue = String.Format("{0}{1}{2}", String.Empty.PadLeft((maximumCellWidths[cellIndex] - thisCell.ToString().Length)/ 2),thisCell.ToString(),String.Empty.PadRight(((maximumCellWidths[cellIndex] - thisCell.ToString().Length + 1) / 2)));

                if (cellIndex == 0 && cellIndex == lastCellIndex)
                    formattedTable.AppendLine(String.Format("{0}{1}{2}", VERTICAL_LINE, thisValue, VERTICAL_LINE));
                else if (cellIndex == 0)
                    formattedTable.Append(String.Format("{0}{1}", VERTICAL_LINE, thisValue));
                else if (cellIndex == lastCellIndex)
                    formattedTable.AppendLine(String.Format("{0}{1}{2}", VERTICAL_LINE, thisValue, VERTICAL_LINE));
                else
                    formattedTable.Append(String.Format("{0}{1}", VERTICAL_LINE, thisValue));

                cellIndex++;
            }

            previousRow = thisRow;

            // SEPARATING LINE:
            if (rowIndex != lastRowIndex)
            {
                nextRow = table[rowIndex + 1];

                int maximumCells = Math.Max(previousRow.Length, nextRow.Length);
                for (int i = 0; i < maximumCells; i++)
                {
                    if (i == 0 && i == maximumCells - 1)
                    {
                        formattedTable.Append(String.Format("{0}{1}{2}", LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), RIGHT_JOINT));
                    }
                    else if (i == 0)
                    {
                        formattedTable.Append(String.Format("{0}{1}", LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
                    }
                    else if (i == maximumCells - 1)
                    {
                        if (i > previousRow.Length)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
                        else if (i > nextRow.Length)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
                        else if (i > previousRow.Length - 1)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE), TOP_RIGHT_JOINT));
                        else if (i > nextRow.Length - 1)
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight((maximumCellWidths[i]), HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
                        else
                            formattedTable.AppendLine(String.Format("{0}{1}{2}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight((maximumCellWidths[i]), HORIZONTAL_LINE), RIGHT_JOINT));
                    }
                    else
                    {
                        if (i > previousRow.Length)
                            formattedTable.Append(String.Format("{0}{1}", TOP_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE)));
                        else if (i > nextRow.Length)
                            formattedTable.Append(String.Format("{0}{1}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE)));
                        else
                            formattedTable.Append(String.Format("{0}{1}", JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE).PadRight(maximumCellWidths[i], HORIZONTAL_LINE)));
                    }
                }
            }

            rowIndex++;
        }

        // LAST LINE:
        for (int i = 0; i < previousRow.Length; i++)
        {
            if (i == 0)
                formattedTable.Append(String.Format("{0}{1}", BOTTOM_LEFT_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
            else if (i == previousRow.Length - 1)
                formattedTable.AppendLine(String.Format("{0}{1}{2}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE), BOTTOM_RIGHT_JOINT));
            else
                formattedTable.Append(String.Format("{0}{1}", BOTTOM_JOINT, String.Empty.PadLeft(maximumCellWidths[i], HORIZONTAL_LINE)));
        }

        return formattedTable.ToString();
    }

}

输出格式很好，看起来很漂亮 ┌──────────┬────────────┬────────────┬────────────┬── ────────┬────────┐ │ Root Id │ HotelRate │ percentan │ RightValue │ Occupied │ Closed │ ├──────────┼────────────┼────────────┼────────────┼── ────────┼────────┤ │ 3034 │ 100 │ 40.816306 │ 15 │ -0 │ -0 │ ├──────────┼────────────┼────────────┼────────────┼── ────────┼────────┤ │ 3035 │ 100 │ 16.666666 │ 0 │ -0 │ 45 │ ├──────────┼────────────┼────────────┼────────────┼── ────────┼────────┤ │ 3036 │ 100 │ 44.44444 │ 0 │ -0 │ 30 │ └──────────┴────────────┴────────────┴────────────┴── ────────┴────────┘ └──────────┴────────────┴────────────┴────────────┴── ────────┴────────┘ 不知怎的，我无法在这里格式化。

【讨论】：

【解决方案14】：

在 VisualBasic.net 中更简单！

如果您希望用户能够手动将数据输入到表格中：

Console.Write("Enter Data For Column 1: ")
    Dim Data1 As String = Console.ReadLine
    Console.Write("Enter Data For Column 2: ")
    Dim Data2 As String = Console.ReadLine

    Console.WriteLine("{0,-20} {1,-10} {2,-10}", "{Data Type}", "{Column 1}", "{Column 2}")
    Console.WriteLine("{0,-20} {1,-10} {2,-10}", "Data Entered:", Data1, Data2)

    Console.WriteLine("ENTER To Exit: ")
    Console.ReadLine()

应该是这样的：

【讨论】：

我认为这很有用，因为我想要的只是 C# 中的简单列对齐，并且 Console.WriteLine() 在两种语言中的工作方式相似。